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Slowly dissolving intradermal microneedles

A patch that deposits an array of microneedle tips under the top layer of the skin enables weeks-long delivery of a contraceptive in rats.

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Fig. 1: A microneedle patch for the prolonged delivery of the contraceptive LNG.


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Correspondence to Ryan F. Donnelly.

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Competing interests

R.F.D. is an inventor of patents that have been licensed to companies developing microneedle-based products and is a paid advisor to companies developing microneedle-based products. E.L. declares no competing interests.

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Donnelly, R.F., Larraňeta, E. Slowly dissolving intradermal microneedles. Nat Biomed Eng 3, 169–170 (2019).

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